Uses your existing flusher and a garden hose to winterize your outboard or sterndrive--even while it's on the trailer! You supply five gallons of nontoxic antifreeze for each engine .A complete do-it-yourself kit for winterizing and descaling your engine! Makes it easy to add antifreeze to inboard/outboard and outboard engines while your boat is on its trailer. All you need is a garden hose, flusher attachment and antifreeze.